I'm getting to the point where I think I would feel comfortable with doing henna for money.  At festivals or farmer's markets, or similar small venues.

What is the best way to get started?  I don't know of many local ladies (anyone in the Waukesha/Milwaukee vicinity let me know :) ), but if anyone is willing, I'd love to apprentice for a while just to see how to do it.

Also, can anyone tell me if it's really even cost effective to do henna on a somewhat limited basis?  I know that I wouldn't necessarily be able to do every festival that comes up, and I know that it can be tricky to get started, plus there are booth fees and the like... so I'm just not sure where to start. 

My thought at this point is that I would keep my designs very simple and limited to the hand or arm, and keep maybe 5 to 10 very simple, 5ish minute desings available.  I also thought about doing simple face painting, just to keep things moving, but I don't know :)

Any suggestions would be great :D